在Turbo C ++中移动圈

Question

how can we move a circle on the screen in Turbo c++ and without clear device i want to move it from left to right and then to right to left my code is here but it is with clear device which make the screen blink a little so any help???

main() {
  int gd=DETECT,gm,col=0; 
  initgraph(&gd,&gm,"../bgi"); 
START: 
  int get = 0;col=40; 
  while(!kbhit()) 
  { 
    rectangle(20,20,getmaxx()-20,getmaxy()-20);
    circle(col,210,20); 
    delay(5); 
    if(col <600 && get == 0) col++; 
    else{ get=1; col--; } 
    cleardevice(); 
    if(col==40) goto START; 
  } 
}

Answer 1

It has been a while since I did Turbo-C++ but I have worked on similar cases. If the circle is hollow you can simulate a clear by redrawing it in the background color. That will be quick enough to avoid the blinks.